Remove DeviceLightEvent implementation

content/renderer/device_sensors/device_light_event_pump.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/renderer/device_sensors/device_light_event_pump.h"
-
-#include "base/time/time.h"
-#include "content/public/renderer/render_thread.h"
-#include "device/sensors/public/cpp/device_sensors_consts.h"
-#include "third_party/WebKit/public/platform/WebDeviceLightListener.h"
-
-namespace {
-// Default rate for firing of DeviceLight events.
-const int kDefaultLightPumpDelayMicroseconds =
-    base::Time::kMicrosecondsPerSecond /
-    device::kDefaultAmbientLightFrequencyHz;
-}  // namespace
-
-namespace content {
-
-DeviceLightEventPump::DeviceLightEventPump(RenderThread* thread)
-    : DeviceSensorMojoClientMixin<
-          DeviceSensorEventPump<blink::WebDeviceLightListener>,
-          device::mojom::LightSensor>(thread),
-      last_seen_data_(-1) {
-  pump_delay_microseconds_ = kDefaultLightPumpDelayMicroseconds;
-}
-
-DeviceLightEventPump::~DeviceLightEventPump() {
-}
-
-void DeviceLightEventPump::FireEvent() {
-  DCHECK(listener());
-  device::DeviceLightData data;
-  if (reader_->GetLatestData(&data) && ShouldFireEvent(data.value)) {
-    last_seen_data_ = data.value;
-    listener()->DidChangeDeviceLight(data.value);
-  }
-}
-
-bool DeviceLightEventPump::ShouldFireEvent(double lux) const {
-  if (lux < 0)
-    return false;
-
-  if (lux == std::numeric_limits<double>::infinity()) {
-    // no sensor data can be provided, fire an Infinity event to Blink.
-    return true;
-  }
-
-  return lux != last_seen_data_;
-}
-
-bool DeviceLightEventPump::InitializeReader(base::SharedMemoryHandle handle) {
-  if (!reader_)
-    reader_.reset(new DeviceLightSharedMemoryReader());
-  return reader_->Initialize(handle);
-}
-
-void DeviceLightEventPump::SendFakeDataForTesting(void* fake_data) {
-  double data = *static_cast<double*>(fake_data);
-
-  listener()->DidChangeDeviceLight(data);
-}
-
-}  // namespace content